MWR Velocity Stacks for the Yamaha MT-09 / Tracer 9 (2021+), XSR900 (2022+), and YZF-R9 (2025+)

MWR High Performance Velocity Stacks – Yamaha R9 / MT-09 / XSR900 / Tracer 900

Upgrade your Yamaha intake system with MWR High Performance Velocity Stacks, designed to provide a precise fit within the factory airbox while optimizing the intake path for performance applications.

Fitment

• Yamaha R9

• Yamaha MT-09 – Gen 3

• Yamaha MT-09 – Gen 4

• Yamaha XSR900

• Yamaha XSR900 GP

• Yamaha Tracer 900

Two-Piece Velocity Stack Design

Each MWR velocity stack features a two-piece construction that allows it to mount neatly and securely into the airbox. An integrated locking/click system holds the upper and lower sections firmly together once installed, providing a clean and secure fit.

The complete kit includes three model-specific velocity stacks:

• 1x Right (R)

• 1x Middle (M)

• 1x Left (L)

Each stack must be installed in its designated position. The Left (L) stack installs on the left side, the Right (R) stack installs on the right side, and the lowest Middle (M) stack installs in the center.

How to Unlock the Velocity Stacks

A 2.5 mm Allen key is required to release the two-piece locking mechanism.

Locate the small access hole on the inside of the velocity stack and insert the Allen key. Apply inward pressure while rotating the stack in the appropriate direction:

• Left (L): Turn clockwise to unlock.

• Right (R): Turn counterclockwise to unlock.

• Middle (M): Turn counterclockwise to unlock.

Installation & Locking

Position the locating tab on the lower section of the velocity stack into the corresponding airbox slot. This helps properly center and align the stack.

Next, position the upper section so the locating pins engage with the appropriate slots. Rotate the upper section until the locking mechanism clicks securely into place.

To fully secure each stack:

• Left (L): Tighten counterclockwise.

• Right (R): Tighten clockwise.

• Middle (M): Tighten clockwise.

Direct-Fit Installation

The MWR High Performance Velocity Stack kit is designed for installation with the compatible factory airbox.

No modifications are required.